Correcting out-of-roundness in annular bodies



Dec. 16, 1941. R. N. HEALD I 2,26 ,034 CORRECTING OUT-OF-ROUNDNESS IN ANNULAB BODIES Filed July 8,1938 Y 2 Sheets -Sheet 1 Rage N. HecLLd Patented Dec. 16, 1941 Zf'or by seasoningn the annular zmemberyf or frequently a serious handicap to proper-opera tiorror'ztfunctioiiin'g'l of the member,' as for example where the latter is required to rotate in a hearing or other support; under these. conditions the out-of-roundness, however slight; tends continually to shift the axis-of rotation and thus prevents the member from running true. By my invention, as hereinafter described, an out-ofround annular member may be subjected to locals of closelyecontrollable ized corrective distortions intensity, preferably while positioned for rotation in the bearing or support in which it is to run. in such fashion as to overcome or at least to minimize the out-of-round condition. Other and further objects and advantages of the invention will more fully appear from the following detailed description taken in connection with the accompanying drawings, in whichview showing, as an 11111::-

a machine tool.

Fig.2 i a transverse sectional view along the line 2-2 of Fig. 1.

Fig. 3 is a fragmentary sectional view along the line 3-3 of Fig. 2. v

Fig. 4 is a fragmentary diagrammatic sectional view, illustrating the effect of the distortions conlike Parts in templated by my invention.

Like reference characters refer to the difierent figures.

As exemplifying a structure to which my in-" in any wel1-known manner as by a belt, now shown, having driving engagement with a pulley 43 secured to one end of sleeve 42.

Obviously, if the outer or bearing surface 44 of said sleeve 42 is out-of-round, the sleeve will not run true in the bore 4|. To overcome such outof-roundness, the present .fromf any-aother: causeiis Pairs ista'egereu -wim expan spaced each of which has outer surface of the sleeve. l8, l6 preferabLv extend only Dart way through g the inner surface oi'th e sleeve at same-wesuc an extent that the high and low the out df roundperi'phery are equalized. In sceordenee 'wiur the present invention; the innei' l surfacabf the sleeve has a plurality of openings '49 therein preferably arrangedin pairs uniformly spaced about the sleeve with-adjacent respectlto each other. In each of these openings is screwed a suitable expansion member such as a tapered screw 46, contact only with-the sleeve and maybe tightened or loosened to exert a localized expanding or contracting action on the adjacent portion of the sleeve, thereby through proper manipulation and adjustment to over come or minimize theout-of-roundness of the The tapered screws the sleeve wall, and the'approximate effect of the screws is shown in Fig. 4, represent a section of the sleeve 42 before the tapered screw is turned tightly enough to exert any expanding forces. After thetapered screw has been forced into the tapped hole, the adjaassumes the position shown in dotted lines by reason of the expanding forces on the inner surface of the sleeve, thereby sleeve immediately adness. is obtained. Or, if it is desired to test 'a so-equipped sleeve 42, when arranged in its bearfor roundness, this can be done by mounting a suitable contact indicatonnot shown, in one or more of the radial openings 47, Fig. 3, of the or finger will just engage, normally with the outer surface 44 of said sleeve. This enables the screws 46, as required.

will be understood that-the showing herein It invention provides for of tapped holes and tapered screws is merely selected points, thereby distorting" the illustrative, and that other similar arrangements for applying localized expanding forces to selected areas or portions of the sleeve may, within the contemplation of my invention, be employed, as for example driven wedges in place of the screws, or other suitable means for applying the desired localized expanding forces on predetermined portions of that surface of the sleeve which is opposite to the surface whose out-ofroundness is to be overcome or corrected.

Although the invention is described-in connec-- tion with a iournalled sleeve, it will be apparent that the invention is equally applicable for correcting the out-of-roundness of any annular member, regardless of the purpose for which it is to be used. The invention may also be applied to the intentional distortion of an annular member to impart to it a predetermined out-ob,

roundness, if desired.

1 claim:

1. In the art of correcting or overcoming the out-of-roundness of one surface of a continuous annular member, the improvement which consists in forming in the wall of said member a plurality of tapered holes spaced circumferentially and axially from each other. entering in some 'or all of said holes, from the opposite surand tightening or ioosenin8 for localized expansions or face, tapered screws, such of said screws,

contractions of the wall material, as will, by dis- 'tortion. establish the approximate roundness of the first-mentioned surface.

. 2. In the art of correcting or overcoming the out-of-roundness of one surface of a continuous annular member, the improvement which consists in providing in the surface opposite the aforesaid surface of said member a plurality of apertures spaced circumferentially and axially from each other. entering in some or all of said apertures from said opposite surface a plurality of adjustable expansion devices, adjusting certain of said devices in selected locations, for such 

